<!DOCTYPE html>
<html lang="en">
<head>
  <!-- Required meta tags -->
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

  <!-- Bootstrap CSS -->
  <link rel="stylesheet" href="./css/bootstrap.css">
  <style>
    .row{
      background: #000000;
      margin-bottom: 2rem;
    }
    .row div{
      background: #399;
      border:1px solid #000000;
    }
  </style>
</head>
<body>
<!--媒体对象 media media-body align-self-# list-unstyled -->
<div class="container">
  <div class="media">
    <img class="mr-3 w-25" src="https://v4.bootcss.com/assets/img/bootstrap-stack.png" alt="xxx">
    <div class="media-body">
      <h5>Media heading</h5>
      <p>Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.</p>
    </div>
  </div>
  <div class="media">
    <img class="mr-3 align-self-center" src="https://v4.bootcss.com/assets/img/bootstrap-stack.png" alt="xxx" width="100">
    <div class="media-body">
      <h5>Media heading</h5>
      <p>Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.</p>
    </div>
  </div>
  <div class="media">
    <img class="mr-3 align-self-end" src="https://v4.bootcss.com/assets/img/bootstrap-stack.png" alt="xxx" width="100">
    <div class="media-body">
      <h5>Media heading</h5>
      <p>Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.</p>
    </div>
  </div>
  <div class="media">
    <img class="ml-3 align-self-start order-1" src="https://v4.bootcss.com/assets/img/bootstrap-stack.png" alt="xxx" width="100">
    <div class="media-body">
      <h5>Media heading</h5>
      <p>Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.</p>
    </div>
  </div>
  <hr/>
  <ul class="list-unstyled">
    <li class="media">
      <img class="ml-3 align-self-start order-1" src="https://v4.bootcss.com/assets/img/bootstrap-stack.png" alt="xxx" width="100">
      <div class="media-body">
        <h5>Media li</h5>
        <p>Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.</p>
      </div>
    </li>
    <li class="media">
      <img class="mr-3 align-self-end" src="https://v4.bootcss.com/assets/img/bootstrap-stack.png" alt="xxx" width="100">
      <div class="media-body">
        <h5>Media li</h5>
        <p>Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.</p>
      </div>
    </li>
  </ul>
</div>


<!--<script src="./js/bootstrap.js"></script>-->
</body>
</html>